[stm32][bluepill] 增加英文参考资料

10e95563 · mysterywolf · 852d7d75 · 852d7d75 · 10e95563
2 changed file
--- a/bsp/stm32/stm32f103-blue-pill/README.pdf
+++ b/bsp/stm32/stm32f103-blue-pill/README.pdf
--- a/bsp/stm32/stm32f103-blue-pill/documents/Beginning STM32 (excerpt).pdf
+++ b/bsp/stm32/stm32f103-blue-pill/documents/Beginning STM32 (excerpt).pdf